用verilog实现1001序列检测电路，并画出状态图

好的，我可以为您提供用Verilog实现1001序列检测电路的代码，并画出状态图。

以下是用Verilog实现1001序列检测电路的代码：

module sequence_detector(
  input clk,
  input reset,
  input data,
  output reg detected
);

reg [3:0] state;

// 状态定义
parameter S0 = 4'b0000;
parameter S1 = 4'b0001;
parameter S2 = 4'b0010;
parameter S3 = 4'b0011;
parameter S4 = 4'b0100;

always @(posedge clk) begin
  if (reset) begin
    state <= S0;
    detected <= 0;
  end
  else begin
    case(state)
      S0: begin
        if (data == 1'b1)
          state <= S1;
        else
          state <= S0;
      end
      S1: begin
        if (data == 1'b0)
          state <= S2;
        else
          state <= S0;
      end
      S2: begin
        if (data == 1'b0)
          state <= S3;
        else
          state <= S0;
      end
      S3: begin
        if (data == 1'b1) begin
          state <= S4;
          detected <= 1;
        end
        else
          state <= S0;
      end
      S4: begin
        state <= S0;
      end
    endcase
  end
end

endmodule

接下来是该电路的状态图：

           +----1----+    0    +----1----+    0    +----0----+
           |         |--------|         |--------|         |
           |    S0   |        |    S1   |        |    S2   |
           |         |<-------|         |<-------|         |
           +----0----+    1    +----0----+    1    +----0----+
                 |              |              | 
                 |              |              |
                 |              |              |
                 |    1         |    0         |    0
                 |              |              |
                 |              |              |
                 |              |              |
           +----1----+    0    +----0----+    1    +----0----+
           |         |--------|         |--------|         |
           |    S3   |        |    S0   |        |    S0   |
           |         |<-------|         |<-------|         |
           +----0----+    1    +----1----+    1    +----1----+
                                          |
                                          |
                                          |
                                          |    1
                                          |
                                          |
                                          |
                                     +----1----+
                                     |         |
                                     |    S4   |
                                     |         |
                                     +----0----+

希望这个代码和状态图对您有帮助！